Cox, who had achieved peace in the village by closing it off and reducing the number of mouths to feed, attempts to get rid of the heroes, but then a monster's voice resounds throughout the village. Yotsuya and the villagers are powerless as a multitude of monsters swarms the village, as if under someone's control. After determining that it would be impossible to defend against the monsters' attack, they decide to flee the village.
Since it's underground, 
the walls are solid.
الحوائط صلبة بما أنّها تحت الأرض
Da wir unter der Erde sind,
sind die Mauern robust.
Al estar bajo tierra,
tiene paredes sólidas.
Al estar bajo tierra,
tiene paredes sólidas.
C’est sous terre,
les murs sont durs.
Visto che è sotto terra, le pareti sono solide.
Já que é no subsolo,
as paredes são sólidas.
Стены прочные, так как под землёй.